<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="jquery-3.7.1.js"></script>
	</head>
	<body>
		<div id="div01"></div>
		<div id="div02"></div>
		<div class="div03"></div>
		<div >4</div>
		<script>
			//jquery核心对象
			console.log($);
			//设置对象
			$("#div01").text("你好，jQuery!")
			$("#div02").html("<a href='https://wwww.baidu.com'>百度</a>")
			
			$("#div01").css("background-color","lightbiue");
			$(".div03").css("background-color","red")
		</script>
		
		
		
		
	</body>
</html>
//修改所有的内容
			//$("div").text("所有内容被我修改了